HPTLC method development and validation for the quantification of gallic acid in poly herbal formulation
HPTLC method is developed to estimate gallic acid in the Poly herbal formulation. Developed methods were statistically evaluated according to ICH guidelines. Ethyl Acetate: Toluene: Methanol: Formic acid (3:2:1:5 v/v) was selected as a solvent system for HPTLC. The formulation was prepared by mixing all the ingredients in equal ratios and extracting them with Alcohol, Petroleum ether, Ethyl acetate, and chloroform. Pure Gallic acid is given a strong spot at Rf 0.65 in this solvent system and absorption maxima comes out to be 254 nm. Ethanolic extract of Salacia reticulata (EESR) and Ethanolic Extract of local formulation (EELF) showed spot of Gallic acid at Rf 0.65 along with nine other spots in this solvent system. The standard curve was plotted between different concentrations of Gallic acid and peak area. The method was found to be linear in the concentration range of 200-2000ng with a correlation coefficient of 0.985. In precision studies, % RSD (Relative standard deviation) ...